Implemented functions and aliases

src/expand/tilde.rs

@@ -1,11 +1,14 @@
 use crate::prelude::*;
 
-pub fn expand_tilde(tilde_sub: Token) -> String {
+pub fn expand_tilde(tilde_sub: Token) -> Token {
 	let tilde_sub_raw = tilde_sub.to_string();
 	if tilde_sub_raw.starts_with('~') {
 		let home = std::env::var("HOME").unwrap_or_default();
-		tilde_sub_raw.replacen('~', &home, 1)
+		tilde_sub_raw.replacen('~', &home, 1);
+		let lex_input = Rc::new(tilde_sub_raw);
+		let mut tokens = Lexer::new(lex_input).lex();
+		tokens.pop().unwrap_or(tilde_sub)
 	} else {
-		tilde_sub_raw
+		tilde_sub
 	}
 }